Check Your Undetectable AI AI Score
See how your text scores against Undetectable AI's detection engine. Per-sentence risk analysis with guided rewrite suggestions.
About Undetectable AI's AI Detection
Undetectable AI runs your text through multiple detection models simultaneously, providing a comprehensive view of AI detection risk.
GPTypo gives you the same sentence-level visibility into detection risk, letting you fix flagged sections yourself.
What Undetectable AI looks for
These are the types of signals that Undetectable AI's classifier measures. GPTypo checks for the same patterns.
Sentence uniformity
AI text tends to produce sentences of similar length and rhythm. High variance is a signal of human writing.
Low perplexity
Predictable word choices with few surprises. Human writers are messier and less statistically smooth.
AI vocabulary
Overuse of phrases like "furthermore," "it is important to note," and "multifaceted" that appear far more often in AI output.
Structural repetition
Repeated paragraph openers, parallel sentence structures, and formulaic transitions between ideas.
Missing texture
Human writing has contractions, hedging, asides, and first-person markers. AI text tends to be uniformly polished.
Document coherence
AI text often has a narrow vocabulary range and smooth sentence-to-sentence flow that reads as artificially consistent.